Telephone system



A. PEISSNER Aug. 9, 1932.

TELEPHONE SYSTE M Filed Feb. 13, 1931 IEFEFIEF' H1 cms P21551151 Patented Aug. 9, 1932 ?-?i I UNITEDLSTATES' PATENT .o-rrlce ALFONS PEISSNER, OF BERLIN, GERMANY, ASSIGN OR 'IO SIEMENS & HALSKE AKTIEN-v GESELLSCHAF'I, F SIEMENSSTADT, NEAR BERLIN, GERMANY rnrnrrionn sYsrEm Application filed February 13, 1931, Serial No. 515,478, and in Germany May 17, 1930. I

The present invention relates to suppression of impulse series in telephone systems.

The object of the invention is to provide an arrangement for absorbing one or more impulse series in automatic, telephone systems without the use of special relays. This is achieved in that the, impulsetransmitting relay remains energized by the switching devices associated with the repeater during the suppression of theimpulse series.

An embodiment of the subject of the invention is shown in the drawing. The invention is not limited to this embodiment and only switching units necessary for the complete understanding of the subject of the invention have been shown.

Impulse series to a switch, e. g. a final selector (not shown) seized over line 11, are transmitted over the a and 6- leads of line L, e. g. from the position of the exchange operator. When line L is seized by the plugging in the plus St into the jack K at the operators position, the two windings of the differential relay A receive current in the following circuit: earth, contact 7 0, winding I of relay A, lower left-hand coil of U2, blead, jack, plug, repeater U1, plug, jack alead, upper left-hand coil of U2, winding II of relay A, battery, earth. In this circuit relay A, the windings I and II of which are dilierentially connected, is not energized. The winding III of relay A is short-circuited over contact 120 relay A has thereby a slow acting deenergization and remains energized while the contact 120 is closed during the impulse series. When the operator operates the contact z', which might belong to a dial, the winding I of relay A is short-circuited at the first closing of this contact, while winding II of the relay is still connected to battery. Thereby relay A responds and closes its contacts 2a, 8a, and 4a. By the closing of contact 4a, relay R, constructed as a slow-acting relay, is energized. During the impulse transmission through contact z' relay A, as described in the above, remains energized, and releases after the transmission of an impulse series due to the longer pause a closed whichvprepared a circuit for relay o,

constructed as a slow-acting relay. Thiscir cuit is only closed when, attherelease of relay A,contact 3a is reclosed. The closing of contact 2a had no eilectas contact 60. had not yet been closed. At the'closing of contact 3a, due to the release of relay A, the following circuit for the relay C is completed, as relay R is constructedas a slowacting relay and keeps its contact 51' closed during a short period after the opening of contact 40;; earth, contacts 57" and 3a, winding of relayv 0, jack, plug, battery, earth. Relay: 0, at its energization, operatesits con-1 tacts -6c,:7c, and 120. I A locking circuit-for relay C is closed over contact 60011 theline ll leading in to the final selector, for the'purpose of seizing the final selector andearthijng the line, governed by the impulse contact 2a. When'now the transmission of'the second impulse series takes place, relay A isener; gized as described in the above. The contact 70 and 12cbeing'opened, the slugging eiiect on-relay A is removed and it-therefore pulses. The opening and closing of contact 30; caused atthe impulsesot relay A, have no eliect as relay C remains energized over itscont'acts 6c, By theopening and closing of contact 2a the succeeding impulse series are trans mitted over line 9 to the succeeding switch. Uponthesetting up of the; connection the conversation can take place'over the repeaters Ul -andUQ, the plug and jack; After the end of the conversation, the original c0ndi tionis reinstated by the pulling out of the plug St. c 1

Inthis manner it is achieved that the first impulse series is suppressed. A plurality of impulse series can also be'suppre'ssed in this manner by the provision offslimple auxiliary means and instead of the short circuitingof one otthewindings of relayA, a locking winding could furtherbe provided, which maintainsthe impulse relay energized while the impulse winding itself is actuated, or. a ,difierential winding can :be provided which has the described efi'ect.

What is claimed is? H1. In a repeater, anincoming and an out: going line, an impulsing'irelay, means ;for

transmitting digit impulses over said incoming line to control said relay, means controlled by said relay for repeating said impulses over said outgoing line, and a normally short-circuited Winding on said relay for maintaining said relay energized throughout the first series of impulses 2. In a repeater, an incoming and an outgoing line, an impulsing relay controlled by digit impulsesrleceived over said incoming line, means controlled by said relay for repeating said impulses over said outgoing, line, a normally short circuited Winding on said relay for renderingthe same slow-acting so that it remains energized throughout the firstseries of impulses, and means for opening said short-circuit at the end of said first series of impulses.-

1 In a repeater, an incoming and an outgoing'line', a line relay responsive to impulses received over said incoming line and adapted to repeat the impulses over said outgoing line,-

, and means for'maintainin'g said relay ener gi'zed during the first series ofimpulses so that said serles is not repeated-over said outgoing line. a

' 4. In a repeater, an incoming and an outgoing line, a line "relay responsive to impulses received over saidincoming line and-adapted to repeat theimpulses over said'outgoingline, means for maintaining said relay energized during the first series of impulses so that said series is not repeatedover said Outgoingfline, and means responsive to the termination of said series of impulses for means. I

- 5. In a te'lephone system, an impulsing relay respon'sive'to digit impu1ses,,a second relay operated responsive to the first operation of said impulsing rela'y, afthird relay, contacts on said secon'd r'elay for preparing a circuit for said third relay, a normally short circuited Winding on said impulsing redisabling said first I means for transmitting a plurality of series of impulses tosaid relay, means controlled by said relay for repeating'said impulses, and

means for absorbing one of said series of im- 7 pulses, said last means including means for rendering said relay inoperative to respond to the impulses of said series.

9. In a telephone system, a line relay, means for transmitting a plurality, of series of impulses to said relay, an outgoing impulsing circuit, meanscontrolled by said relay for repeating saidimpulses over said outgoing impulsing circuit, means including a shortcircuited Winding on saidrelay for absorbing one of said series of impulses, and means efi'ective at the termination of said series for opening the short-circuitjofsa'id Winding and for preparing said outgoing impulsin'g cir- In vvitness whereof, I hereunto subscribe my name this 13th day of January, A. D. 1931.

' .ALFONS' PEISSNER.

My for'maintaining the; same energized throughout the first series of-impulses, contacts on said impulsingrelay for completing the circuit of said thirdrelay When the inipulsing relay'deenergizesat the end of said series of impulses, and contacts ons'aidthird relay for opening the short-circuit around said Winding. I p

. 6. In a telephone system, an impulsing relay "responsive to digit impulses, a normally short-circuited y'vinding on said relay vfor maintaining said relay operated during the first series of impulses, a second'rela'y, means for energizing said second relay at thetermination of said series of impulses, and contacts on said second 'relay foropeniIig'said Ian 

